I don't think it should be the role of developers to write "good prompts" I think ideally an intermediate layer should optimize the information passed to an LLM.
Like what Agentic IDEs are starting to do. I don't copy paste code in the correct way to optimize my prompt, I select the code I want, with MCPs picking up you might not even have to paste input/output the Agent can run it and parse it into the LLM in an optimal way.
Of course, the quality of your instructions matter but I think that falls outside of "prompt engineering"
Like what Agentic IDEs are starting to do. I don't copy paste code in the correct way to optimize my prompt, I select the code I want, with MCPs picking up you might not even have to paste input/output the Agent can run it and parse it into the LLM in an optimal way.
Of course, the quality of your instructions matter but I think that falls outside of "prompt engineering"